How to set corner with different round corner radius?

[infodungeon]

Is there way to set the corner circle center and radius for each corner independently?
I couldn't find a way so tried removing a triangle and adding a circle on one corner but kb_builder didn't like the idea of removing and adding overlapping for some reason.

Trying to do something a little fancy. Steno layout trying to put a bigger curve on the front of the case than the rear to balance the key layout.

Any suggestions?

Thanks,
Robert

http://www.keyboard-layout-editor.com/##@_backcolor=%230080ff&name=Plover&author=Robert%20Fontaine&notes=A%20First%20try%20at%20a%20basic%20plover%20layout.%0AG20%20Keycap%20colors,%0ANot%20sure%20how%20to%20make%20the%20keycaps%20look%20right.&background_name=Aluminium%20brushed%20wavy&style=background-image%2F:%20url('%2F%2Fbg%2F%2Fmetal%2F%2Faluminum%2F_texture1738.jpg')%2F%3B%3B&radii=10px%2010px%2030px%2030px&switchMount=cherry&switchBrand=gateron&switchType=KS-3-White&plate:true&css=%3B&@_c=%23909596&a:5%3B&=1&=2&=3&=4&=5&=6&=7&=8&=9&=0%3B&@_c=%232790c2&p=G20&a:7&h:2%3B&=S&=T&=P&=H&_c=%23909596&h:2%3B&=*&_c=%232790c2%3B&=F&=P&=L&=T&=D%3B&@_x:1%3B&=K&=W&=R&_x:1%3B&=R&=B&=G&=S&=Z%3B&@_x:2.5%3B&=A&=O&=E&=U

[swill]

This is currently not supported... If you fork this repository, you could probably change the code of this repo to do that for you, but I don't officially support that functionality at this point.